• To anyone looking to acquire commercial radio programming software:

    Please do not make requests for copies of radio programming software which is sold (or was sold) by the manufacturer for any monetary value. All requests will be deleted and a forum infraction issued. Making a request such as this is attempting to engage in software piracy and this forum cannot be involved or associated with this activity. The same goes for any private transaction via Private Message. Even if you attempt to engage in this activity in PM's we will still enforce the forum rules. Your PM's are not private and the administration has the right to read them if there's a hint to criminal activity.

    If you are having trouble legally obtaining software please state so. We do not want any hurt feelings when your vague post is mistaken for a free request. It is YOUR responsibility to properly word your request.

    To obtain Motorola software see the Sticky in the Motorola forum.

    The various other vendors often permit their dealers to sell the software online (i.e., Kenwood). Please use Google or some other search engine to find a dealer that sells the software. Typically each series or individual radio requires its own software package. Often the Kenwood software is less than $100 so don't be a cheapskate; just purchase it.

    For M/A Com/Harris/GE, etc: there are two software packages that program all current and past radios. One package is for conventional programming and the other for trunked programming. The trunked package is in upwards of $2,500. The conventional package is more reasonable though is still several hundred dollars. The benefit is you do not need multiple versions for each radio (unlike Motorola).

    This is a large and very visible forum. We cannot jeopardize the ability to provide the RadioReference services by allowing this activity to occur. Please respect this.

Kenwood TK-790 Questions

Apr 16, 2015
Gouverneur NY
Hey, just a couple quick questions as I didn't see anything like this posted.

I acquired a TK-790 from eBay, (Appears to be a radio that once belonged to Missouri State Highway Patrol) when I got it I opened it up to see if the ignition sense modification had been done, but while I was in there I found something peculiar that I could not find an answer for searching here, Google, or even the service manual.

On the control board there is a 15 kΩ resistor between the EPT (External PTT signal input) pin of C507 and R690. The original R690 and R692 are absent which I could not find a reference table showing both of them removed. I've attached a photo of this resistor. Any input would be helpful.
Now my second question, I know the modification to increase the audio output to 13W has been done, but I can barely get the volume knob off the lowest setting and I'm about blowing my ear drums. I've attached a photo of the maximum I can go with the speaker knob. Im just curious if that's normal with this modification or not. I have the KES-4 speaker hooked up to it. I'll undo the modification if that will help but don't want to waste my time if it won't change anything.



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Lead Wiki Manager and almost an Awesome Moderator
Super Moderator
Jul 18, 2004
Central Indiana
Did someone botch the Horn Alert configuration?